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Acta Agron Sin ›› 2009, Vol. 35 ›› Issue (4): 741-744.doi: 10.3724/SP.J.1006.2009.00741

• RESEARCH NOTES • Previous Articles     Next Articles

QTL Mapping of Resistance to Silk Cut in Maize

WEI Xin12,LI Li-Hua2,WANG Zhen-Hua2,SONG Rui1,ZENG Xing1,ZHANG Zhi-Ming1,PAN Guang-Tang1*   

  1. 1Maize Research Institute/Key Laboratory Crop Genetic Resources and Improvement,Ministry of Education,Sichuan Agricultural University,Ya'an 625014,China;2Cereal Crop Research Institute,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China
  • Received:2008-07-16 Revised:2008-12-13 Online:2009-04-12 Published:2009-02-16
  • Contact: PAN Guang-Tang E-mail:pangt@sicau.edu.cn

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Abstract:

Using 115 SSR markers and the F2 population consisting of 348 lines derived from the cross between maize (Zea mays L.) inbred lines R08 and Es40, a genetic linkage map associated with the resistance to silk cut was constructed. The genetic linkage map covered 2 178.6 cM of maize genome with an average mapping distance of 18.9 cM. Using the composite interval mapping (CIM) method, 12 QTLs controlling the resistance to silk cut were detected on chromosomes 1, 2, 4, 5, and 7. These QTLs explained phenotypic variances ranging from 4.22% to 37.95%. Among them, two major QTLs on chromosomes 1 and 3, which explained more than 30% of phenotypic variances, had dominance effect, whereas, the other 10 QTLs had partial dominance effect or additive effect.

Key words: Maize(Zea mays L.), Silk-cut, QTL mapping, Genetic linkage map, SSR

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